It's Elemental - Isotopes of the Element Polonium

Isotopes of the Element Polonium
[Click for Main Data]

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

All Known Isotopes of the Element Polonium

Mass Number	Half-life	Decay Mode	Branching Percentage

188	0.40 milliseconds	Electron Capture	< 100.00

		Alpha Decay	> 0.00

190	2.53 milliseconds	Alpha Decay	100.00

		Electron Capture	0.10

191	22 milliseconds	Alpha Decay	100.00

191_m	98 milliseconds	Alpha Decay	100.00

192	33.2 milliseconds	Alpha Decay	~ 99.50

		Electron Capture	~ 0.50

193	0.24 seconds	Alpha Decay	<= 100.00

193_m	0.42 seconds	Alpha Decay	<= 100.00

194	0.392 seconds	Alpha Decay	100.00

195	4.64 seconds	Alpha Decay	75.00

		Electron Capture	25.00

195_m	1.92 seconds	Alpha Decay	~ 90.00

		Electron Capture	~ 10.00

		Isomeric Transition	< 0.01

196	5.8 seconds	Alpha Decay	~ 98.00

		Electron Capture	~ 2.00

197	1.4 minutes	Electron Capture	56.00

		Alpha Decay	44.00

197_m	31 seconds	Alpha Decay	84.00

		Electron Capture	16.00

		Isomeric Transition	0.01

198	1.77 minutes	Alpha Decay	57.00

		Electron Capture	43.00

199	4.58 minutes	Electron Capture	92.50

		Alpha Decay	7.50

199_m	4.13 minutes	Electron Capture	73.50

		Alpha Decay	24.00

		Isomeric Transition	2.50

200	10.9 minutes	Electron Capture	88.90

		Alpha Decay	11.10

201	15.3 minutes	Electron Capture	98.40

		Alpha Decay	1.60

201_m	8.9 minutes	Isomeric Transition	56.00

		Electron Capture	41.00

		Alpha Decay	~ 2.90

202	44.7 minutes	Electron Capture	98.08

		Alpha Decay	1.92

203	36.7 minutes	Electron Capture	99.89

		Alpha Decay	0.11

203_m	45 seconds	Isomeric Transition	~ 100.00

		Alpha Decay	~ 0.04

204	3.53 hours	Electron Capture	99.34

		Alpha Decay	0.66

205	1.66 hours	Electron Capture	99.96

		Alpha Decay	0.04

206	8.8 days	Electron Capture	94.55

		Alpha Decay	5.45

207	5.80 hours	Electron Capture	99.98

		Alpha Decay	0.02

207_m	2.79 seconds	Isomeric Transition	100.00

208	2.898 years	Alpha Decay	100.00

		Electron Capture	No Data Available

209	102 years	Alpha Decay	99.52

		Electron Capture	0.48

210	138.376 days	Alpha Decay	100.00

211	0.516 seconds	Alpha Decay	100.00

211_m	25.2 seconds	Alpha Decay	99.98

		Isomeric Transition	0.02

212	0.299 microseconds	Alpha Decay	100.00

212_m	45.1 seconds	Alpha Decay	99.93

		Isomeric Transition	0.07

213	3.65 microseconds	Alpha Decay	100.00

214	164.3 microseconds	Alpha Decay	100.00

215	1.781 milliseconds	Alpha Decay	100.00

		Beta-minus Decay	2.3E-4

216	0.145 seconds	Alpha Decay	100.00

217	1.47 seconds	Alpha Decay	> 95.00

		Beta-minus Decay	< 5.00

218	3.10 minutes	Alpha Decay	99.98

		Beta-minus Decay	0.02

219	≈ 2 minutes	Alpha Decay	No Data Available

		Beta-minus Decay	No Data Available

Isotopes of the Element Polonium[Click for Main Data]

Isotopes of the Element Polonium
[Click for Main Data]